Drill-press attachment for offset drilling.



D. J. TRIVERS & J2 M. SCHNEIDER. DRILL PRESS ATTACHMENT FOR oPPsBTDRILLING.

APPLICATION FILED MAY 18, 1914.

Patented Oct. 6, 1914.

DNEEL J. TRIVEBS, OF BRIDGEPORT, AND JOHN lli. SCHNEIBER, 0F LONG- HELL,

CONNECTICUT.

' DRILL-PRESS ATTACHMENT FUR OFFSET ERILLING.

animee.

T all whom t may concern.'

Be it known that we, (l) DANIEL J. Tmvnns, a subject of the King ofGreat Britain, and (2) JOHN M. SCHNEIDER, a citizen of the UnitedStates, residing at (l) Bridgeport and (2) Long Hill, county ofFairfield, State of Connecticut, have invented an improvement inDrill-Press Attachments for @fiset Drilling, of which the following is aspecification. y

rlhis invention has for its object to provide an attachment for drillpresses that shall be relatively inexpensive to roduce, easy to attach,to detach and to ad]ust' and which will enable the operator to usevarious tools, as a counter bore, drill, reamer, mill, or a chuck forcarrying a tool, in an off-set position, that is, out of alinement withthe spindle of the press. In other words, our novel attachment enablesthe operator to perform various operations wit a drill press inpositions that cannot be reached by tools attached directly to thespindle of the ress. p With this object in view we have-devised thenovel attachment of which the following description in connection withthe accompanying drawing is a specification, reference characters beingused to indicate the several parts:

Figure 1 is a view partly in elevation and partly in sectionillustrating the construction and mode of operation of our novelattachment; Fig. 2 an inverted plan view corresponding with Fig. 1, thetool being removed; Fig. 3 a perspective on an enlarged scale of thelower portion'of the tool carrying bevel gear; Fig. l a perspective of atool adapted to engage the Gear, and Fig. 5 is an elevation of a portionof a drill press showing the sleeve to which the attachment isconnected, and the chuck by which the driving mechanism of theattachment is actuated.

l0 denotes the table of a drill press, l1 the spindle, 12 a chuckcarried thereby, and 13 a stationary sleeve in which the spindlerotates.

'Our novel attachment comprises essentially a body 14, an arm 15adjustable thereon in the horizontal plane, a shaft 16 mounted to rotatein the body and having at its upper end a head 17 adapted to engagechuck 12 and at its lower end a bevel gear 18 which meshes with a bevelgear 19 on a Specification of Letters Patent. v

Patented @ein n, igid.

Application filed May 18, 1914. Serial No. 339,259.

shaft 20 mounted to rotate in a bearing block 21 secured to the arm andcarrying at its other end a bevel gear 22 which engages a bevel gear 23by which the tool is carried.

The body is provided with a socket 24 which receives both the chuck andthe lower end of the sleeve. The chuck receives the head of shaft 16 andtransmits motion thereto and the body is rigidly secured to the Y sleeyein any suitable manner. ln the present instance we have shown the upperend of Vthe body as split and as clamped upon the sleeve by means of ascrew 25 passing throughlugs on the body, indicated by dotted linesonly.v The arm is adjustably secured to the body in a similar manner,the

rear end ofthe arm bein split and provided with lugs 2G throng whichascrew 27 passes to draw the ln'gs together and clamp thearm upon thebody at any desired adjustment in the horizontal plane. The body isshown as provided with a iange 28 against which the arm is set inattaching it. The `bearing block 21 in which shaft 20 is mounted torotate liesin a recess inthe under side ofthe arm and is secured to thearm by screws 29.

rlhe means for attaching tools is an important feature of .theinvention. Bevel gear 23 is provided with a central hole 31 and on itsunder side with a neck 30, and the neck is provided at its lower endwith a transverse dovetail groove 32. The hole receives a short shaft 33which extends slightly below the lower end of the neck. The bevel gearis shown as secured to the shaft by a pin 34.

35 denotes a tool, in the present instance a counter-sink. |The body ofthe tool is provided with a dovetail 36 which is adapted to engagegroove 32 in the neck, and with a socket 37 at the mid-length of thedovetail, which receivesthe lower end of the short shaft. The upper endof the short shaft is provided with a head 38 which rests upon the arm,the upper side of which is shown as provided with a recess 39 to receivethe head.

temes; from the spindle the pycess, diffe@ em lengths of arms and Shafhe9,0 are el? comme requref.

To change eols o? 'to Shift from e, toote a Chuck, is simply neceseay toremove pin 3? mise the short shaft mld hen slide the deveta on the 'kooiom; of engagemeni Wh the @20m/e in the neck of beve gea? E-evng thusesee om` invention We daim:

An zztmehmenh of tde ehemeter described comprising a, bey having esocket adaped i0 feceve zr, Stationm'j sleeve., e vel tca shaz; in seidbedy hei/'ing a, head miep@ ed to engage a meeting @huele an arm edjueiably eecme :te the bely in: the hari- Zonte pene7 hozonm and vetca-Shafts in said 31m? beve geers; im *"nedee said shafts? Whefeby nemotion. mf'ifle ehu/ck is tranemtee to the 'veifsee shaft in the amm andmeme fm seeming me?. Said 'verzif cal shaft.

arm geaed to 'the horzonial Sha-Tt, the

en said vertical shaft hmm@ e vided its lower end with deve-eil 1;10027'and a tool haw/*511g ovem mhp-ted ensad geom/e,

5. All etachmeut of ehamete described comps-lng a hey, en ejusib ablyseemed 'hee'o, e Veffnee shaft im seid erm having; eA bead engaging' theiop of the iufm, a bevel geen. deteeably engaging seid shaf and havinge. meek provided et its lower end. with a te'nsverse deve'tal g'oeve,said vsheni; passing thwmgfh the gear zmi below alle meek, and a tehaving a, secke' to receive the end of the and a dovetel te engage ihegimme Said toe being ocked 'ce the meek, ete the engagement ef thedovete with Ehe groeve by the engagement of the end of the shaft wh thee eket.

e. An a'mchment @if the eheraezex de scribedcomprising e body, :u1 mmadjustable theleolfU e deteehfe 'Deming block in seid Mm, herizentalShzlf mounce 'to 1'0- 'te-e in Seid block, a, vertical shaft 11a-ving eheed :resting en the arm, bevel gear Wheels on sai-d smfis, the eea?wheel on 'the vertczd sm; having necf with e tlansvelse devegel grooveand 'be Shaft passing 'ghrough the gear whee and beow the neck, and eias-Q1 having doveaeil. t@ engage Said. g'eeve a eeeke; "so eceve theend of 'the shaft L). Estime-ny Whex'eoeff' 'We our signegmee inpresence @we wneeses.

